[Feature] add options cwd for transfer

[alexander-akait]

Need to set cwd for transfer files

[pstadler]

https://github.com/pstadler/flightplan#transportwithcommandoptions-options-fn

[alexander-akait]

@pstadler

var command = util.format('rsync --files-from %s %s --rsh="ssh -p%s%s" ./ %s',
                              tmpFile, rsyncFlags,
                              remote.port || 22, sshFlags, remoteUrl);

in code set current cwd automatic for rsync ./

[alexander-akait]

@pstadler relative on local compute

[pstadler]

right, added a hint to #71